Bob, do you know that my fish bags were wrapped with a tape , which was saying "Checked by U.S. Border Security" , as i opened my luggages when i got back to Turkey. This was the first thing i saw when i opened my luggages and freaked out. Buttt, no all fish were fine and untouched. So it is not illegal to take fish out, believe me

. Yes, it is not legal here in Turkey to bring those fish but here customs are more interested in iphones and ipad than innocent fish.
Fatih,
No doubt you were watched closer here due to your country of origin.
Your country probably has a lot more important things to deal with than a handful of fish. I see suicide bombing are on the rise in your country. And of course the situation in Syria and Russian flyovers is of concern.
Largemouth bass may already be established in your country too. I know largemouth bass are found as far away as China, Japan, and South Africa. The Chinese are raising largemouth bass for foodfish.
Bringing fish this way would have been very different situation, and I know of fish farmers here that have been fined thousands of dollars for just bringing fish illegally across state lines. We have a federal law that kicks in called the Lacy Act if illegal fish cross state lines. Violating federal laws can get really nasty here.
Bongo,
I would think Europe and specifically Poland would have more than a passing interest in catching someone bringing in a nonnative species. Additionally just because you can away with it doesn't make it legal or right. Yes trout roe can be imported but there is extensive health testing.
And folks for all we know Bongo is a set up, as we had a long thread on Fatih's fish, and the Internet isn't exactly the best place to keep a secret. LOL Lot's of agents out there that would love to peg up an international arrest. It's not hard to home in on something by using keywords in a search. A special software makes it even easier.